Coral

“Coral is the name applied to the stony structures secreted by many of the actinozoa, and applied to the animals themselves. The coral of commerce is the production of various polyps, and is of different colors and internal structure. B– part of a stock of red coral, with (a) fully extended polyp and (b, b) two polyps, partly extended. “—(Charles Leonard-Stuart, 1911)

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